20e241bd03
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Self-collapsing elements (zero height, no padding/border, no BFC, no line boxes) now have their top and bottom margins collapse together, and child margins propagate through parents with auto height and no bottom padding/border. This replaces the pairwise collapse_margins() function with a MarginSet accumulator that tracks max positive and min negative margins separately, correctly resolving chains of 4+ margins. Key changes: - Add is_self_collapsing() post-layout predicate and gather_all_margins() - Add gather_margin_bottom() for bottom margin propagation with a guard against propagation when max-height constrains the parent - Replace prev_margin_bottom with MarginSet-based pending_margins in the sibling layout loop - Handle clearance + self-collapsing interaction correctly Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
31 lines
1.3 KiB
Plaintext
31 lines
1.3 KiB
Plaintext
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content: (0, 0, 800, 75.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 0 0 0 0
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LayoutBox node=#3 tag=body box=block
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content: (8, 8, 784, 51.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 8 8 8 8
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LayoutBox node=#5 tag=p box=block
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content: (8, 24, 784, 19.2)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 16 0 16 0
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inline_context: 1 lines, height=19.2, max_width=181.68575
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line[0]: rect=(8, 24, 181.68575, 19.2) fragments=7
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frag[0]: rect=(8, 25.6, 24.622612, 16) text="Tom" start=false end=false
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frag[1]: rect=(35.676945, 25.6, 8.599119, 16) text="&" start=false end=false
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frag[2]: rect=(47.330395, 25.6, 25.527166, 16) text="Jerry" start=false end=false
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frag[3]: rect=(75.91189, 25.6, 40.14097, 16) text="<span>" start=false end=false
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frag[5]: rect=(130.76064, 25.6, 31.400883, 16) text="literal" start=false end=false
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frag[6]: rect=(165.21585, 25.6, 24.469896, 16) text="text." start=false end=false
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LayoutBox node=#6 tag=anonymous box=anon
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content: (0, 0, 181.68576, 16)
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padding: 0 0 0 0
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border: 0 0 0 0
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margin: 0 0 0 0
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text: "Tom & Jerry <span> &..."
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